摘要
北部湾盆地中深层构造复杂、储层横向变化快且低孔低渗,常规拖缆地震资料反演结果无法满足油田开发阶段油藏精细描述的需求。以涠西南凹陷涠洲A油田流沙港组为例,提出了基于海底电缆资料道集优化的低渗储层预测方法,首先基于目标采集优化观测系统获取宽频宽方位的海底电缆资料,并结合叠前CRP道集优化技术组合提升道集品质;在此基础上引入角度和横波的信息开展叠前储层预测,借鉴坐标旋转的思路,联合纵横波速度比和泊松阻抗双参数定义最优有利储层指示属性,定量预测出有利储层垂向及平面展布,并结合多属性融合技术预测储层物性指示甜点分布,预测结果与实钻情况吻合良好,成功指导开发井优化部署和钻探,取得了良好效果。本文方法能够提高海上油田区低渗储层预测的精度,可有效规避开发风险,提高经济效益。
The structure of the middle-deep layers of the Beibuwan basin is complex,its lateral change of reservoir is rapid,its porosity and permeability are low,and the inversion results of the conventional streamer seismic data cannot meet the requirements of detailed reservoir description for oilfield development.By taking the Liushagang Formation of Weizhou A oilfield in the Weixinan sag as an example,a low permeability reservoir prediction method based on submarine cable data gather optimization was proposed.Firstly,the submarine cable data of wide-frequency and wide-azimuth was obtained with the target acquisition and optimization observation system,and the pre-CRP gather optimization technology combination was used to improve the quality of the gather.On this basis,the angle and shear wave information was introduced to carry out the pre-stack reservoir prediction.By referring to the idea of coordinate rotation,in combination with the dual-parameter of V P/V S ratio and the Poisson’s impedance,the indices of the most favorable reservoir were defined,the longitudinal and planar distribution of the favorable reservoir was quantitatively predicted,and the distribution of sweet points with good reservoir physical properties were predicted by means of the multi-attribute integrating technology.The prediction result was in good agreement with the actual drilling,and it successfully guided the optimal deployment and drilling of development wells.The method in this paper can improve the prediction accuracy of low-permeability reservoirs in offshore oilfields,effectively avoid the development risks,and improve the economic benefits.
作者
顾霜霜
周家雄
隋波
马光克
蒋成
李轶彬
GU Shuangshuang;ZHOU Jiaxiong;SUI Bo;MA Guangke;JIANG Cheng;LI Yibin(CNOOC China Limited,Zhanjiang Branch,Zhanjiang,Guangdong 524023,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2018年第6期62-70,共9页
China Offshore Oil and Gas
基金
"十三五"国家科技重大专项"南海西部海域低渗油藏勘探开发关键技术(编号:2016ZX05024-006)"部分研究成果
关键词
低渗储层预测
海底电缆资料
道集优化
双参数联合
储层甜点分布
开发井优化部署
low permeability reservoir prediction
submarine cable data
gather optimization
dual-parameter combination
distribution of reservoir sweet points
optimal deployment of development wells
